Проблемы особо опасных инфекций, вып. 2, 2013 42 Несмотря на значительные успехи, достигнутые в области лабораторной диагностики туляремии, соз-дание новых препаратов для детекции Francisella tularensis, в том числе на основе иммуноферментного анализа (ИФА), не утрачивает актуальности [4].В нашей стране зарегистрирован набор реаген-тов «Тест-система диагностическая для выявления возбудителя туляремии в иммуноферментном ана-лизе (ИФА) (ИФА-Тул-СтавНИПЧИ» (производства ФКУЗ «Ставропольский научно-исследовательский противочумный институт»), в котором реализуется классический вариант ИФА с использованием спец-ифических поликлональных антител. Тем не менее, разработка альтернативных вариантов ИФА тест-систем представляет значительный практический ин-терес. Так, дот-вариант иммуноферментного анализа (ДИА), отличающийся от твердофазного ИФА на по-листироловых планшетах большей экспрессностью, экономичностью в отношении расхода реагентов, простотой постановки и учета результатов, является весьма эффективным и удобным диагностическим методом.Важный аспект конструирования современных диагностических препаратов -замена поликлональ-ных иммунореагентов моноклональными, которые можно получить в виде стандартного чистого хими-ческого реагента и в практически нелимитированном количестве [3, 8]. Тест-системы на основе монокло-нальных антител (МКА) приобретают особую цен-ность в связи со способностью последних вступать На основе моноклональных антител к липополисахариду Francisella tularensis разработана дот-иммуноферментная тест-система для детекции туляремийного микроба «ДИАТул-М». При анализе чистых инактивированных культур 17 штаммов туляремийного микроба разных подвидов и 78 штаммов гетерологич-ных бактерий, а также контаминированных ими проб плазмы крови, сыворотки крови людей, суспензий органов лабораторных мышей, почвы и воды тест-система «ДИАТул-М» характеризовалась высокой специфичностью в отношении возбудителя туляремии. С микробными клетками гетерологичных бактерий даже в высокой кон-центрации (1·10 9 м.к./мл) регистрировалась отрицательная реакция. Чувствительность диагностикума состави-ла 1-5·10 6 м.к./мл. Тест-система обеспечивала получение стабильных результатов после хранения в течение 6 месяцев (срок наблюдения). Медицинские испытания набора реагентов «Тест-система дот-иммуно ферментная для детекции туляремийного микроба моноклональная» продемонстрировали перспективность его внедрения в практику российского здравоохранения с возможностью использования как в стационарных, так и в полевых условиях.Ключевые слова: Francisella tularensis, моноклональные антитела, дот-иммуноанализ, иммунодиагностика. Using monoclonal antibodies to Francisella tularensis lipopolysaccharide, designed is a dot-blot immune-enzyme test-system "DIATul-M" for tularemia microbe detection. Its specificity has been tested on 17 strains of tularemia microbe, 78 strains of heterologous bacteria, infected blood plasma samples, human blood sera, suspensions obtained from laboratory mice organs, and soil and water samples. This test system has ...
The aim of the study was to study the prognostic factors of the effectiveness of plasmon photothermal therapy (PPT) in rats with transplanted liver cancer based on an assessment of the degree of tumor vascularization. Prior to any exposure, rats with transplanted liver cancer RS-1 underwent a doppler ultrasonography to assess the degree of vascularization of the transplanted tumors. Half of the animals with transplanted tumors were removed from the experiment after dopplerography to determine the content of vascular factors in blood serum by immunoassay and immunohistochemical methods in tumor tissue. After triple intravenous administration of gold nanorods (GNRs) coated with polyethylene glycol at a dose of 0.4 mg/ml, the transplanted tumors were irradiated percutaneously with infrared laser radiation at a wavelength of 808 nm and a thermography of local tumor heating was conducted. After 24 hours, the animals were removed from the experiment and samples of tumor tissue were taken for histological examination. It was found that the accumulation of gold in the tumor tissue and the effectiveness of PPT after repeated intravenous administration of GNRs are determined by the presence of a formed vasculature in the tumor.
Neuro communication brain ‘the gut-brain’ provides the neural network with the ‘axis of the bowel-brain’ (Gut-Brain Axis, GBA). Promising are the studies of neural networks ‘microbiota-brain’ at the neuroendocrine and neurophysiological level. Microbiota - an organ that plays an important role in ensuring human health and in the development of various diseases, including age-associated. The treatment regimens for age-related pathology include traditional methods of treatment (recovery of melatonin and circadian rhythms, physical exercise, proper, balanced, functional nutrition, principles of a healthy lifestyle, etc.), but taking into account the available scientific data, it is necessary to include in the list of therapeutic and rehabilitation measures methods of managing the composition and/or diversity of intestinal microbiota. Visceral and cognitive brain regulating melatonin levels alter intestinal flora and improve antimicrobial actions. Functional and a balanced diet ensure the functioning of the circadian neuro axis ‘brain-gut’ while eating ‘brain’ and ‘microbiota’...
Background. A crucial role in the development of cancer is played by the tumor microenvironment (TM) – a microenvironment that is formed as a result of the interaction between the tumor tissue and macroorganism cells. The concentration of TM cytokines in the blood varies depending on the activity of the tumor and the presence of a metastatic process. It is advisable to study the existing mediator imbalance of TM, its characteristic features in the process of tumor development for the diagnosis and prognosis of the tumor process.The aim. To identify markers of tumor progression in the study of tissue and serum cytokines in women diagnosed with breast cancer.Materials and methods. The object of the study is blood serum cytokines and tumor supernatants (MCP-1, VEGF, TNF-α, IFN-γ, TGF-β1, G-CSF, GM-CSF). The study involved 80 patients with breast cancer aged 50–69 years and 26 practically healthy women aged 41 to 62 years. A standard examination of women was conducted; a cytokine profile study was conducted before the appointment of therapy. To study the cytokine profile at the tissue level, tumor biopsies (n = 30) and biopsies of unchanged breast tissue (n = 6) were incubated to determine the production of MCP-1, VEGF, TNF-α, IFN-γ, TGF-β1, G-CSF, GM-CSF.Results. There was a moderate positive correlation between the stage of the disease and the level of TGF-β1, MCP-1 blood serum, a weak one – with G-CSF. In the incubated tumor tissue, a high positive correlation of cytokines on the stage of the disease is observed in growth factors: VEGF (R = 0.79; p > 0.05) and TGF-β1 (R = 0.61; p > 0.05).Conclusion. The study revealed the characteristic features of the cytokine profile of blood serum and tumor tissue in breast cancer at local and widespread stages. The revealed differences in the level of cytokines should be used as additional diagnostic indicators of the degree of activity and prevalence of the tumor process.
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